[PATCH v2 5/5] arm64: dts: rockchip: add USB-C support for ROCK 5B+

[Sebastian Reichel <sebastian.reichel@collabora.com>]

Add hardware description for the USB-C port in the Radxa ROCK 5 Model B+
This describes the OHCI, EHCI and XHCI USB parts, but not yet the DisplayPort
AltMode, since the bindings for that are not yet upstream.

Support for the ROCK 5B is prepared, but not exposed at the moment,
since it results in unreliable boot behavior due to hard resets killing
the supply voltage. Some further investigation and fixes in the kernel's
Type-C Port Manager (TCPM) state machine is needed before exposing the
port. The ROCK 5B+ has a dedicated port for powering the board and thus
is not affected.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 .../boot/dts/rockchip/rk3588-rock-5b-plus.dts      |  16 +++
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts    |  23 ++++
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dtsi   | 137 +++++++++++++++++++++
 3 files changed, 176 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
index 74c7b6502e4dda4b774f43c704ebaee350703c0d..4096cd853f9a909e4233d2c61a1fe5ee83904c4c 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
@@ -99,12 +99,28 @@ pcie3x2_rst: pcie3x2-rst {
 	};
 
 	usb {
+		usbc_sbu_dc: usbc-sbu-dc {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>,
+					<0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <1 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 };
 
+&usbc0 {
+	status = "okay";
+};
+
+&usbdp_phy0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usbc_sbu_dc>;
+	sbu1-dc-gpios = <&gpio0 RK_PC4 GPIO_ACTIVE_HIGH>;
+	sbu2-dc-gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+};
+
 &vcc5v0_host {
 	enable-active-high;
 	gpio = <&gpio1 RK_PA1 GPIO_ACTIVE_HIGH>;
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
index 9407a7c9910ada1f6c803d2e15785a9cbd9bd655..ab0c572ea9234f373af4a47db93fc1786f0e6fbf 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
@@ -36,8 +36,20 @@ &uart6 {
 	status = "okay";
 };
 
+&usbdp_phy0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usbc_sbu_dc>;
+	sbu1-dc-gpios = <&gpio4 RK_PA6 GPIO_ACTIVE_HIGH>;
+	sbu2-dc-gpios = <&gpio4 RK_PA7 GPIO_ACTIVE_HIGH>;
+};
+
 &pinctrl {
 	usb {
+		usbc_sbu_dc: usbc-sbu-dc {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>,
+					<0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
@@ -50,3 +62,14 @@ &vcc5v0_host {
 	pinctrl-names = "default";
 	pinctrl-0 = <&vcc5v0_host_en>;
 };
+
+/*
+ * Do not yet offer USB-C support on the Rock 5B. The current U-Boot
+ * Linux setup is quite unstable and for many power-supplies needs multiple
+ * hard resets to boot to userspace. Let's enable this once the issues
+ * in the TCPM kernel code have been solved. Without this any automated
+ * boot tests will run into problems.
+ */
+/delete-node/ &usbc0;
+/delete-node/ &usb_host0_xhci;
+/delete-node/ &usbdp_phy0;
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dtsi
index 6052787d2560978d2bae6cfbeea5fc1d419d583a..314fdc0c1c20b25b0fdc5254f3b090586c169a00 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dtsi
@@ -5,6 +5,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/soc/rockchip,vop2.h>
+#include <dt-bindings/usb/pd.h>
 #include "rk3588.dtsi"
 
 / {
@@ -92,6 +93,15 @@ rfkill-bt {
 		shutdown-gpios = <&gpio3 RK_PD5 GPIO_ACTIVE_HIGH>;
 	};
 
+	vcc12v_dcin: regulator-vcc12v-dcin {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc12v_dcin";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+	};
+
 	vcc3v3_pcie2x1l0: regulator-vcc3v3-pcie2x1l0 {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -146,6 +156,19 @@ vcc5v0_sys: regulator-vcc5v0-sys {
 		regulator-boot-on;
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc12v_dcin>;
+	};
+
+	vbus5v0_typec: vbus5v0-typec {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio2 RK_PB6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vbus5v0_typec_en>;
+		regulator-name = "vbus5v0_typec";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc5v0_sys>;
 	};
 
 	vcc_1v1_nldo_s3: regulator-vcc-1v1-nldo-s3 {
@@ -309,6 +332,67 @@ regulator-state-mem {
 	};
 };
 
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4m1_xfer>;
+	status = "okay";
+
+	usbc0: usb-typec@22 {
+		compatible = "fcs,fusb302";
+		reg = <0x22>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <RK_PB4 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&usbc0_int>;
+		vbus-supply = <&vbus5v0_typec>;
+		/*
+		 * When the board is starting to send power-delivery messages
+		 * too late (5 seconds according to the specification), the
+		 * power-supply reacts with a hard-reset. That removes the
+		 * power from VBUS for some time, which resets te whole board.
+		 */
+		status = "fail";
+
+		usb_con: connector {
+			compatible = "usb-c-connector";
+			label = "USB-C";
+			data-role = "dual";
+			power-role = "sink";
+			try-power-role = "sink";
+			op-sink-microwatt = <1000000>;
+			sink-pdos =
+				<PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>,
+				<PDO_VAR(5000, 20000, 5000)>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					usbc0_role_sw: endpoint {
+						remote-endpoint = <&dwc3_0_role_switch>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+					usbc0_orien_sw: endpoint {
+						remote-endpoint = <&usbdp_phy0_orientation_switch>;
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+					dp_altmode_mux: endpoint {
+						remote-endpoint = <&usbdp_phy0_dp_altmode_mux>;
+					};
+				};
+			};
+		};
+	};
+};
+
 &i2c6 {
 	status = "okay";
 
@@ -481,6 +565,16 @@ pcie3_vcc3v3_en: pcie3-vcc3v3-en {
 			rockchip,pins = <1 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	usb {
+		usbc0_int: usbc0-int {
+			rockchip,pins = <3 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		vbus5v0_typec_en: vbus5v0-typec-en {
+			rockchip,pins = <2 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pwm1 {
@@ -866,6 +960,14 @@ &uart2 {
 	status = "okay";
 };
 
+&u2phy0 {
+	status = "okay";
+};
+
+&u2phy0_otg {
+	status = "okay";
+};
+
 &u2phy1 {
 	status = "okay";
 };
@@ -893,6 +995,27 @@ &u2phy3_host {
 	status = "okay";
 };
 
+&usbdp_phy0 {
+	mode-switch;
+	orientation-switch;
+	status = "okay";
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		usbdp_phy0_orientation_switch: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&usbc0_orien_sw>;
+		};
+
+		usbdp_phy0_dp_altmode_mux: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&dp_altmode_mux>;
+		};
+	};
+};
+
 &usbdp_phy1 {
 	status = "okay";
 };
@@ -905,6 +1028,20 @@ &usb_host0_ohci {
 	status = "okay";
 };
 
+&usb_host0_xhci {
+	usb-role-switch;
+	status = "okay";
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		dwc3_0_role_switch: endpoint {
+			remote-endpoint = <&usbc0_role_sw>;
+		};
+	};
+};
+
 &usb_host1_ehci {
 	status = "okay";
 };

-- 
2.47.2